DocumentCode :
3603717
Title :
Vectored Implementation of Hierarchical 
QAM
Author :
Alasti, Hadi ; Gazor, Saeed
Author_Institution :
Dept. of Electr. Eng. Technol., ECPI Univ., Newport, VA, USA
Volume :
62
Issue :
11
fYear :
2015
Firstpage :
1103
Lastpage :
1107
Abstract :
A practical, structurally simple, and scalable Gray-coded vectored hierarchical implementation is presented for 22n quadrature amplitude modulation with square constellation. The complexity of the vectored constellation mapping and the Gray codec is significantly reduced. The proposed modulator and demodulator algorithms are scalable, which make them favorable in adaptive and hierarchical modulations on software-defined radio platforms. The proposed algorithms are implemented on low-power Atmel SAM3X8E ARM Cortex-M3 microcontroller, as a test platform.
Keywords :
Gray codes; adaptive modulation; codecs; demodulators; low-power electronics; microcontrollers; quadrature amplitude modulation; software radio; Gray codec; Gray-coded vectored hierarchical implementation; adaptive modulations; demodulator algorithms; hierarchical QAM; hierarchical modulations; low-power Atmel SAM3X8E ARM Cortex-M3 microcontroller; quadrature amplitude modulation; software-defined radio platforms; square constellation; vectored constellation mapping; Circuits and systems; Complexity theory; Decoding; Demodulation; Phase shift keying; Quadrature amplitude modulation; Circuits and Systems for Software-Defined Radio (SDR).; Circuits and systems for software-defined radio (SDR); Digital Modulation Schemes; digital modulation schemes;
fLanguage :
English
Journal_Title :
Circuits and Systems II: Express Briefs, IEEE Transactions on
Publisher :
ieee
ISSN :
1549-7747
Type :
jour
DOI :
10.1109/TCSII.2015.2456374
Filename :
7156116
Link To Document :
